State profile · Below median Poor share

Maryland bridge safety

According to the Federal Highway Administration's 2024 National Bridge Inventory, condition ratings, load ratings, and Poor-condition shares for every public highway bridge in Maryland.

5,484
Public bridges
32.3%
Good condition
4.6%
Poor condition

Maryland holds 5,484 public highway bridges (#34 of 52 by inventory) with a 4.56% Poor share (#38 of 52 by Poor share).

That is 4.6% of the state's inventory, against an average of 7.5% across the 54 states and territories with Poor-rated bridges on file, which places it 15 of 54 ordered from the lowest Poor share upward. A bridge is rated Poor when its weakest applicable component scores 4 or below on the inspecting agency's 0-9 scale, so the category is a maintenance and funding signal rather than a closure order or a live crossing-safety verdict.

Inventory: FHWA NBI 2024 · last ETL August 2026

Total Bridges

5,484

Public highway bridges in Maryland

Good Condition

32.3%

1,771 bridges rated 7-9

-17.7pp vs 50% benchmark

Poor Condition

4.6%

250 bridges whose lowest applicable component is rated 0-4

-3.0pp vs national avg 7.5%

Maryland vs national bridge condition

Maryland - Good condition share 32.3%
National avg

Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).

Maryland - Poor-condition share 15.2%
National avg

Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.5%.

Maryland in the national condition pattern

Each point is a state or territory in the FHWA NBI; the highlighted point is this profile.

Inventory size and Poor-condition share are different measures: Maryland has 5,484 bridges and a 4.6% Poor-condition share in the 2024 NBI, rank #15 of 54 jurisdictions ordered from the lowest share upward. The dashed comparisons mark the national average state rate and the midpoint of the plotted inventory range; neither is a live safety or closure threshold. Scatter plot of 54 data points. 0%10%20%30%40% 0k20k40k60k Public bridges in inventory (thousands) Poor-condition share (%) MD, Public bridges in inventory (thousands): 5.5k · Poor-condition share (%): 4.56%AL, Public bridges in inventory (thousands): 16.2k · Poor-condition share (%): 3.35%AK, Public bridges in inventory (thousands): 1.7k · Poor-condition share (%): 7.89%AZ, Public bridges in inventory (thousands): 8.6k · Poor-condition share (%): 1.15%AR, Public bridges in inventory (thousands): 13k · Poor-condition share (%): 5.43%CA, Public bridges in inventory (thousands): 25.8k · Poor-condition share (%): 5.91%CO, Public bridges in inventory (thousands): 9k · Poor-condition share (%): 4.82%CT, Public bridges in inventory (thousands): 4.4k · Poor-condition share (%): 4.72%DE, Public bridges in inventory (thousands): 0.9k · Poor-condition share (%): 1.26%DC, Public bridges in inventory (thousands): 0.3k · Poor-condition share (%): 1.95%FL, Public bridges in inventory (thousands): 13k · Poor-condition share (%): 2.79%GA, Public bridges in inventory (thousands): 15.1k · Poor-condition share (%): 1.59%GU, Public bridges in inventory (thousands): 0k · Poor-condition share (%): 12.77%HI, Public bridges in inventory (thousands): 1.2k · Poor-condition share (%): 6.53%ID, Public bridges in inventory (thousands): 4.6k · Poor-condition share (%): 4.9%IL, Public bridges in inventory (thousands): 26.9k · Poor-condition share (%): 9.35%IN, Public bridges in inventory (thousands): 19.5k · Poor-condition share (%): 5.22%IA, Public bridges in inventory (thousands): 23.7k · Poor-condition share (%): 19.16%KS, Public bridges in inventory (thousands): 24.9k · Poor-condition share (%): 5.26%KY, Public bridges in inventory (thousands): 14.5k · Poor-condition share (%): 7.37%LA, Public bridges in inventory (thousands): 12.7k · Poor-condition share (%): 11.48%ME, Public bridges in inventory (thousands): 2.5k · Poor-condition share (%): 15.41%MA, Public bridges in inventory (thousands): 5.3k · Poor-condition share (%): 8.88%MI, Public bridges in inventory (thousands): 11.4k · Poor-condition share (%): 11.27%MN, Public bridges in inventory (thousands): 13.5k · Poor-condition share (%): 4.44%MS, Public bridges in inventory (thousands): 16.7k · Poor-condition share (%): 6.03%MO, Public bridges in inventory (thousands): 24.6k · Poor-condition share (%): 8.95%MT, Public bridges in inventory (thousands): 5.2k · Poor-condition share (%): 6.81%NE, Public bridges in inventory (thousands): 15.4k · Poor-condition share (%): 7.9%NV, Public bridges in inventory (thousands): 2.1k · Poor-condition share (%): 1.14%NH, Public bridges in inventory (thousands): 2.5k · Poor-condition share (%): 7.51%NJ, Public bridges in inventory (thousands): 6.8k · Poor-condition share (%): 6.01%NM, Public bridges in inventory (thousands): 4k · Poor-condition share (%): 4.51%NY, Public bridges in inventory (thousands): 17.6k · Poor-condition share (%): 9.43%NC, Public bridges in inventory (thousands): 19.2k · Poor-condition share (%): 6.76%ND, Public bridges in inventory (thousands): 4.3k · Poor-condition share (%): 10.98%OH, Public bridges in inventory (thousands): 26.7k · Poor-condition share (%): 4.74%OK, Public bridges in inventory (thousands): 22.9k · Poor-condition share (%): 7.7%OR, Public bridges in inventory (thousands): 8.3k · Poor-condition share (%): 4.61%PA, Public bridges in inventory (thousands): 23.3k · Poor-condition share (%): 12.58%PR, Public bridges in inventory (thousands): 2.4k · Poor-condition share (%): 13.92%RI, Public bridges in inventory (thousands): 0.8k · Poor-condition share (%): 15.2%SC, Public bridges in inventory (thousands): 9.5k · Poor-condition share (%): 6.17%SD, Public bridges in inventory (thousands): 5.9k · Poor-condition share (%): 16.36%TN, Public bridges in inventory (thousands): 20.4k · Poor-condition share (%): 4.41%TX, Public bridges in inventory (thousands): 56.7k · Poor-condition share (%): 1.23%UT, Public bridges in inventory (thousands): 3.1k · Poor-condition share (%): 2.91%VT, Public bridges in inventory (thousands): 2.9k · Poor-condition share (%): 2.9%VI, Public bridges in inventory (thousands): 0k · Poor-condition share (%): 29.17%VA, Public bridges in inventory (thousands): 14.1k · Poor-condition share (%): 3.39%WA, Public bridges in inventory (thousands): 8.5k · Poor-condition share (%): 5.45%WV, Public bridges in inventory (thousands): 7.3k · Poor-condition share (%): 18.64%WI, Public bridges in inventory (thousands): 14.4k · Poor-condition share (%): 6.52%WY, Public bridges in inventory (thousands): 3.1k · Poor-condition share (%): 6.51%
Inventory size and Poor-condition share are different measures: Maryland has 5,484 bridges and a 4.6% Poor-condition share in the 2024 NBI, rank #15 of 54 jurisdictions ordered from the lowest share upward. The dashed comparisons mark the national average state rate and the midpoint of the plotted inventory range; neither is a live safety or closure threshold.

Maryland vs all states by public bridge inventory

Where this state's FHWA NBI public-highway bridge count sits among every state and territory on PlainBridges

5,484 34th of 54 higher than 20 of 54 states

States and territories, banded by public bridge inventory size

Each bar is a band; taller bars hold more states. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.

Source FHWA National Bridge Inventory · 2024

Read the rank neighborhood for Maryland

The highlighted point is Maryland: 5,484 bridges and 4.56% in Poor condition, rank #15 of 54 jurisdictions ordered from the lowest share upward. The five jurisdictions immediately above and below Maryland on that same Poor-share ordering:

  • Minnesota: 13,532 bridges · 4.44% Poor
  • New Mexico: 4,035 bridges · 4.51% Poor
  • Maryland: 5,484 bridges · 4.56% Poor
  • Oregon: 8,305 bridges · 4.61% Poor
  • Connecticut: 4,365 bridges · 4.72% Poor

The full national sortable table lives on the rankings page.

Material families in Maryland

Exclusive FHWA material families across all 5,484 bridges in this state; continuous variants fold into the parent family. Orthogonal to the Poor-share scatter above.

Who maintains Maryland’s inventory

State agency holds 53.4% of the 5,484 public highway bridges filed under Maryland in the 2024 NBI, the agency-of-record split for this state, not a condition verdict.

When Maryland’s bridges were built

Pre-1950 construction accounts for 15.9% of the 5,484 bridges with a recorded original year in Maryland. Era bands are orthogonal to the Poor-share ranking above.

Condition Distribution

Maryland32.3%63.1%GoodFairPoor
Bridge inventory deck-condition mix - Maryland (FHWA NBI)

Counties (24)

Allegany 245 Anne Arundel 389 Baltimore 783 Baltimore city 374 Calvert 33 Caroline 70 Carroll 205 Cecil 193 Charles 94 Dorchester 47 Frederick 486 Garrett 139 Harford 275 Howard 309 Kent 44 Montgomery 515 Prince George's 576 Queen Anne's 88 Somerset 46 St. Mary's 50 Talbot 42 Washington 300 Wicomico 99 Worcester 82

Maryland vs nearby ranks

Adjacent states by Poor-condition share (lower share = better)

States are ranked by the share of bridges whose lowest applicable component rating is 4 or below. This describes recorded condition; it does not measure funding effectiveness or live crossing safety. States here sit immediately above and below Maryland on the same metric.

MN

Minnesota

4.44% top marginal rate
Structure
Progressive
Burden @ $100K
$13,532

NM

New Mexico

4.51% top marginal rate
Structure
Progressive
Burden @ $100K
$4,035
Selected

MD

Maryland

4.56% top marginal rate
Structure
Progressive
Burden @ $100K
$5,484

OR

Oregon

4.61% top marginal rate
Structure
Progressive
Burden @ $100K
$8,305

CT

Connecticut

4.72% top marginal rate
Structure
Progressive
Burden @ $100K
$4,365

Bridges Needing Most Attention in Maryland

Six lowest-condition bridges in Maryland, ranked by the portal's composite display score. Inspection intervals are risk-based under current NBIS rules.

WASHINGTON STREET

Poor

Over: CSXT RAILROAD

0.2 MI W OF CUMBERLAND ST, Allegany, MD

Built 1930 Load: 0.0 t ADT: 110

CUMBERLAND STREET

Poor

Over: CSXT RAILROAD

0.6 MI E OF WASHINGTON ST, Allegany, MD

Built 1929 Load: 0.0 t ADT: 110

MILL STREET

Poor

Over: ROCK RUN

.01 MI S. OF RACE STREET, Cecil, MD

Built 1940 Load: 0.0 t ADT: 100

BACK LANDING ROAD

Poor

Over: HUNTING CREEK

ON CAROLINE COUNTY LINE, Dorchester, MD

Built 1941 Load: 0.0 t

TALBOT AVENUE

Poor

Over: CSXT RAILROAD

0.2 MI E OF MICHIGAN AVE, Montgomery, MD

Built 1918 Load: 0.0 t ADT: 1,430

TAYLOR MILL ROAD

Poor

Over: OLD MILL STREAM BRANCH

0.7 MILE EAST OF MD 213, Queen Anne's, MD

Built 1955 Load: 0.0 t ADT: 100

All Bridges in Maryland

MD 210 BALD EAGLE

Good

Over: IS 95/IS 495

0.027 MI N OF MD 414, Prince George's, MD

Built 2005 Load: 59.9 t ADT: 552

IS 95 RAMP G(9)

Good

Over: IS 95/495 & RAMP A(8)

0.72 MI S OF WASH DC, Prince George's, MD

Built 2005 Load: 59.9 t ADT: 8,837

IS 595 RAMP A(5)

Good

Over: COBB ROAD

IS 595 IS 95-495 INT, Prince George's, MD

Built 1988 Load: 59.9 t ADT: 22,154

MD 3

Good

Over: MD 3E

0.55 MILE NORTH OF IS 595, Prince George's, MD

Built 1989 Load: 59.9 t ADT: 61,810

DOGWOOD ROAD

Good

Over: DOGWOOD RUN

2.74 MI. W. OF IS 695, Baltimore, MD

Built 2018 Load: 59.9 t ADT: 7,043

NEW CUT ROAD

Good

Over: MILL POND STREAM

1.02 MILES N OF MD 282, Cecil, MD

Built 2000 Load: 59.9 t ADT: 242

CEDARDAY DRIVE

Good

Over: TRIBUTARY TO BYNUM RUN

1.0 MILES E OF CEDAR LANE, Harford, MD

Built 2005 Load: 59.9 t ADT: 221

OAK VALLEY DRIVE

Good

Over: TRIB / PLUMTREE RUN

0.3 MILES S OF W RIDING D, Harford, MD

Built 2005 Load: 59.9 t ADT: 55

LINDEN LANE

Good

Over: CSXT RAILROAD

0.5 MI W OF SEMINARY ROAD, Montgomery, MD

Built 1996 Load: 59.9 t ADT: 4,090

PENNYFIELD LOCK RO

Good

Over: UNNAMED TRIBUTARY

0.8 MI S OF RIVER ROAD, Montgomery, MD

Built 2017 Load: 59.9 t ADT: 529

LITTLE SENECA PKWY

Good

Over: LITTLE SENECA CREEK

0.1 MI. E. OF MD 355, Montgomery, MD

Built 2014 Load: 59.9 t ADT: 10,875

MD 200 Ramp ES

Good

Over: MD 200 (ICC) Ramp SB

0.10 Mi. West of US 29, Montgomery, MD

Built 2010 Load: 59.9 t ADT: 2,449

MD 100P-HARMANS RD

Good

Over: MD 100

0.5 MI E OF MD 713, Anne Arundel, MD

Built 1995 Load: 60.3 t ADT: 6,211

IS 695

Good

Over: SECURITY BOULEVARD

0.46 MILE NORTH OF IS 70, Baltimore, MD

Built 1961 Load: 60.3 t ADT: 203,902

US 15 NBR

Good

Over: MD 15C

0.77 MILE SOUTH OF MD 77, Frederick, MD

Built 1985 Load: 60.3 t ADT: 30,800

US 15 SBR

Good

Over: MD 15C

0.77 MILE SOUTH OF MD 77, Frederick, MD

Built 1985 Load: 60.3 t ADT: 30,800

DOGWOOD RD

Good

Over: DOGWOOD RUN

0.1 MI E OF GILLESPIE RD, Cecil, MD

Built 1996 Load: 60.3 t ADT: 991

BILLINGSLEY RD WBR

Good

Over: PINEY BRANCH

2.5 MI E OF ST CHAR. PKWY, Charles, MD

Built 1994 Load: 60.3 t ADT: 7,022

OLD FREDERICK ROAD

Good

Over: FISHING CREEK

AT UTICA RD INT, Frederick, MD

Built 1954 Load: 60.3 t ADT: 3,332

MADONNA ROAD

Good

Over: CATTAIL BRANCH

0.4 MILE S OF MT HOREB RD, Harford, MD

Built 1992 Load: 60.3 t ADT: 789

RACE TRACK ROAD

Good

Over: HORSEPEN BRANCH

1.37 MILES S OF MD 197, Prince George's, MD

Built 2006 Load: 60.3 t ADT: 21,230

ELL MORRIS ROAD

Good

Over: LONG MARSH DITCH

1.12 MI EAST OF MD 313, Queen Anne's, MD

Built 1985 Load: 60.3 t ADT: 720

MORRIS ROAD

Good

Over: CAMPBELL DITCH

1.7 MI N OF MD 350, Wicomico, MD

Built 1998 Load: 60.3 t ADT: 122

MD 200 (ICC) WB

Good

Over: Good Hope Tributary

0.45 Mi East of MD650, Montgomery, MD

Built 2010 Load: 60.3 t ADT: 32,064

SUNNYSIDE AVENUE

Good

Over: INDIAN CREEK

0.09 MI W OF MD 201, Prince George's, MD

Built 2020 Load: 60.6 t ADT: 8,931

IS 83/IS 695

Good

Over: MD 25A

0.36 MILE NORTH OF MD 25, Baltimore, MD

Built 2005 Load: 60.8 t ADT: 176,700

SHAKER DR

Good

Over: MD 32

0.75 MI N OF MD 732, Howard, MD

Built 1981 Load: 60.8 t ADT: 5,031

MD 187B (ROCKLEDGE

Good

Over: 1S 270

0.29 MILE NORTH OF MD 187, Montgomery, MD

Built 2002 Load: 60.8 t ADT: 19,205

MERRY KNOLL LANE

Good

Over: BRANCH OF OCTORARO CREEK

0.45 MI N OF US RTE 1, Cecil, MD

Built 1990 Load: 60.8 t ADT: 188

MIDDLETOWN ROAD

Good

Over: PINEY BRANCH

0.75 MI S. OF MD RTE 228, Charles, MD

Built 2007 Load: 60.8 t ADT: 3,414

GLISSANS MILL RD

Good

Over: SOUTH FORK LINGANORE CRK

0.1 MI W OF EMERS BURR RD, Frederick, MD

Built 1983 Load: 60.8 t ADT: 884

TERRA FIRMA ROAD

Good

Over: LONG BRANCH

AT MD 144, Frederick, MD

Built 2006 Load: 60.8 t ADT: 3,143

WALTER MARTZ ROAD

Good

Over: LITTLE TUSCARORA CREEK

0.3 MI N OF POOLE JONES R, Frederick, MD

Built 2012 Load: 60.8 t ADT: 4,173

OLD MONTGOMERY RD

Good

Over: DEEP RUN

0.5 MI S OF MD RTE 103, Howard, MD

Built 2013 Load: 60.8 t ADT: 9,224

BROOKSIDE VISITORS

Good

Over: NORTHWEST BRANCH TRIBUTA

ENT. FROM GLENALLEN AVE., Montgomery, MD

Built 1999 Load: 60.8 t ADT: 55

EDEN MILL ROAD

Good

Over: BIG BRANCH

0.4 MILES W OF FAWN GR RD, Harford, MD

Built 1961 Load: 60.9 t ADT: 177

MD 36

Good

Over: GEORGES CREEK

0.09 MILE SOUTH OF MD 935, Allegany, MD

Built 1981 Load: 61.2 t ADT: 5,740

MD 70

Good

Over: WEEMS CREEK

0.37 MI S OF IS 595, Anne Arundel, MD

Built 2006 Load: 61.2 t ADT: 38,762

MD 4 RAMP 5

Good

Over: LYONS CREEK

AA/CAL COUNTY LINE, Calvert, MD

Built 2003 Load: 61.2 t ADT: 7,166

IS 370

Good

Over: IS 370 RAMP M

0.21 MILE EAST OF MD 355, Montgomery, MD

Built 1988 Load: 61.2 t ADT: 81,998

IS 95/IS 495 RMP 6

Good

Over: MD 5 RAMP 5

2.82 MILE NORTH OF MD 414, Prince George's, MD

Built 2006 Load: 61.2 t ADT: 16,037

MD 213

Good

Over: MILL STREAM BRANCH

0.29 MILE NORTH OF MD 18C, Queen Anne's, MD

Built 2019 Load: 61.2 t ADT: 17,000

MD 68

Good

Over: ST JAMES RUN

1.338 MI W OF MD 65, Washington, MD

Built 2014 Load: 61.2 t ADT: 5,200

STONEY RUN ROAD

Good

Over: STONEY RUN

0.1 MI W OF MD RTE 170, Anne Arundel, MD

Built 1982 Load: 61.2 t ADT: 10,559

GWYNNBROOK AVENUE

Good

Over: GWYNNS FALLS

1.04 MILES E OF MD 140, Baltimore, MD

Built 1992 Load: 61.2 t ADT: 9,800

GREENSPRING AVENUE

Good

Over: MOORES BRANCH

0.65 MI S OF MD 133, Baltimore, MD

Built 1965 Load: 61.2 t ADT: 8,341

PEACH TREE ROAD

Good

Over: CSXT RAILROAD

1 MI S OF BARNESVILLE RD, Montgomery, MD

Built 2000 Load: 61.2 t ADT: 400

I95 NORTHBOUND

Good

Over: FUTURE RAMP MB

I695 IS95 Interchange, Baltimore, MD

Built 2008 Load: 61.2 t ADT: 52,628

IS 81 NB

Good

Over: MD 63/68

0.88 MI N OF WEST VA LINE, Washington, MD

Built 1965 Load: 61.6 t ADT: 61,300

IS 81 SB

Good

Over: MD 63/68

0.88 MI N OF WEST VA LINE, Washington, MD

Built 1965 Load: 61.6 t ADT: 61,300

Showing 4,651-4,700 of 5,484 bridges

Related

All states → | National rankings → | Understanding conditions → | Retired SD term explained →
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges.

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the FHWA National Bridge Inventory (NBI). Poor condition is an inspection-record category, not a closure or unsafe-to-cross designation. Consult the bridge owner for current status.

Understanding Bridge Conditions

How FHWA rates bridge condition on a 0-9 scale.

Check Your Daily Bridges

How to look up bridge condition data for bridges on your route.

Read our methodology — how this data is sourced, computed, and verified.

What to do with this

Use Maryland's inventory picture to drill to a county or a specific span.

  • Browse counties in Maryland and open the highest-Poor shares first. County list
  • See where this state sits among peers on Poor-condition share. State rankings
  • Compare this state with another jurisdiction on the same measures. State compare

NBI condition ratings are inventory snapshots, not live crossing-safety verdicts.

Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. Maryland Good/Fair/Poor shares and county rollups on this page are computed from the same NBI extract as the national boards; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.